Corten A588 Flat Bar Supplier
Corten A588 flat bar is a hot‑rolled weathering steel bar made to ASTM A588 (often marketed as COR‑TEN) that develops a protective rust‑like patina for superior atmospheric corrosion resistance. This high‑strength, low‑alloy steel offers typical minimum yield strength of 50, is weldable/formable with compatible low‑hydrogen fillers, and is ideal for exposed applications like architectural facades, bridges, landscape edging/planters, screens, signage, and sculpture. For best performance, leave surfaces unpainted to allow patina formation, ensure good drainage, and avoid continuously wet, submerged, or marine/coastal chloride environments.
- A588 is considered the ASTM equivalent for Cor-Ten® flat bar
- Dual certified to meet:
- ASTM A588 (Learn more)
- ASTM A709-50W (Learn more)
- Standard stock length is 20’
Mechanical Properties
- Yield = 50ksi min.
- Tensile = 70ksi min.


















